diff options
Diffstat (limited to 'net/ax25/ax25_dev.c')
| -rw-r--r-- | net/ax25/ax25_dev.c | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/net/ax25/ax25_dev.c b/net/ax25/ax25_dev.c new file mode 100644 index 000000000..1dc039233 --- /dev/null +++ b/net/ax25/ax25_dev.c @@ -0,0 +1,238 @@ +/* + * AX.25 release 036 + * + * This is ALPHA test software. This code may break your machine, randomly fail to work with new + * releases, misbehave and/or generally screw up. It might even work. + * + * This code REQUIRES 2.1.15 or higher/ NET3.038 + * + * This module: + * This module is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Other kernels modules in this kit are generally BSD derived. See the copyright headers. + * + * + * History + * AX.25 036 Jonathan(G4KLX) Split from ax25_route.c. + */ + +#include <linux/config.h> +#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/socket.h> +#include <linux/in.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/timer.h> +#include <linux/string.h> +#include <linux/sockios.h> +#include <linux/net.h> +#include <net/ax25.h> +#include <linux/inet.h> +#include <linux/netdevice.h> +#include <linux/if_arp.h> +#include <linux/skbuff.h> +#include <net/sock.h> +#include <asm/uaccess.h> +#include <asm/system.h> +#include <linux/fcntl.h> +#include <linux/mm.h> +#include <linux/interrupt.h> + +ax25_dev *ax25_dev_list = NULL; + +ax25_dev *ax25_dev_ax25dev(struct device *dev) +{ + ax25_dev *ax25_dev; + + for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) + if (ax25_dev->dev == dev) + return ax25_dev; + + return NULL; +} + +ax25_dev *ax25_addr_ax25dev(ax25_address *addr) +{ + ax25_dev *ax25_dev; + + for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) + if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) + return ax25_dev; + + return NULL; +} + +/* + * This is called when an interface is brought up. These are + * reasonable defaults. + */ +void ax25_dev_device_up(struct device *dev) +{ + ax25_dev *ax25_dev; + unsigned long flags; + + if ((ax25_dev = kmalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) { + printk(KERN_ERR "ax25_dev_device_up out of memory\n"); + return; + } + +#ifdef CONFIG_SYSCTL + ax25_unregister_sysctl(); +#endif + + memset(ax25_dev, 0x00, sizeof(*ax25_dev)); + + ax25_dev->dev = dev; + ax25_dev->forward = NULL; + + ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE; + ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE; + ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF; + ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE; + ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW; + ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW; + ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1; + ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2; + ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3; + ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE; + ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2; + ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN; +#ifdef CONFIG_AX25_DAMA_SLAVE + ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_PROTO_DAMA_SLAVE; +#else + ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL; +#endif + ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT; + + save_flags(flags); cli(); + ax25_dev->next = ax25_dev_list; + ax25_dev_list = ax25_dev; + restore_flags(flags); + +#ifdef CONFIG_SYSCTL + ax25_register_sysctl(); +#endif +} + +void ax25_dev_device_down(struct device *dev) +{ + ax25_dev *s, *ax25_dev; + unsigned long flags; + + if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) + return; + +#ifdef CONFIG_SYSCTL + ax25_unregister_sysctl(); +#endif + + save_flags(flags); cli(); + +#ifdef CONFIG_AX25_DAMA_SLAVE + ax25_ds_del_timer(ax25_dev); +#endif + + /* + * Remove any packet forwarding that points to this device. + */ + for (s = ax25_dev_list; s != NULL; s = s->next) + if (s->forward == dev) + s->forward = NULL; + + if ((s = ax25_dev_list) == ax25_dev) { + ax25_dev_list = s->next; + restore_flags(flags); + kfree_s(ax25_dev, sizeof(ax25_dev)); +#ifdef CONFIG_SYSCTL + ax25_register_sysctl(); +#endif + return; + } + + while (s != NULL && s->next != NULL) { + if (s->next == ax25_dev) { + s->next = ax25_dev->next; + restore_flags(flags); + kfree_s(ax25_dev, sizeof(ax25_dev)); +#ifdef CONFIG_SYSCTL + ax25_register_sysctl(); +#endif + return; + } + + s = s->next; + } + + restore_flags(flags); +#ifdef CONFIG_SYSCTL + ax25_register_sysctl(); +#endif +} + +int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd) +{ + ax25_dev *ax25_dev, *fwd_dev; + + if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL) + return -EINVAL; + + switch (cmd) { + case SIOCAX25ADDFWD: + if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL) + return -EINVAL; + if (ax25_dev->forward != NULL) + return -EINVAL; + ax25_dev->forward = fwd_dev->dev; + break; + + case SIOCAX25DELFWD: + if (ax25_dev->forward == NULL) + return -EINVAL; + ax25_dev->forward = NULL; + break; + + default: + return -EINVAL; + } + + return 0; +} + +struct device *ax25_fwd_dev(struct device *dev) +{ + ax25_dev *ax25_dev; + + if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) + return dev; + + if (ax25_dev->forward == NULL) + return dev; + + return ax25_dev->forward; +} + +#ifdef MODULE + +/* + * Free all memory associated with device structures. + */ +void ax25_dev_free(void) +{ + ax25_dev *s, *ax25_dev = ax25_dev_list; + + while (ax25_dev != NULL) { + s = ax25_dev; + ax25_dev = ax25_dev->next; + + kfree_s(s, sizeof(ax25_dev)); + } +} + +#endif + +#endif |